Well-tool.



H. A. BARDEBN.

WELL TOOL.

GATION FILED JAN. 6, 1913.

APPLI Patenteu mar. 16, 1915' HUGH A. BAEDEEN, OF HOLLYWOOD, GALIFORNIA, ASSIGNQR 0T? ONE-FGURTH T8 HARLAN G. PALMER AND ONE-HALF TO SAY E. RANDALL, BOTH OF LOS ANGELES,

CALIFORNIA.

WELL-TOOL.

Specification of Letters Patent.

Patented Mar. 16, 1915,

. Application filed January 6, 1513. Serial No. 740.555.

To elite/ 10m it may concern:

Be it known that I, Hneri A. BARunEN, a citizen of the United States, residing at Hollywood, in the county of Los Angcles and Stateof California, have invented a new and useful Well-Tool, of which the'following-is a specification.

In drilling oil wells it frequently happens that water is encountered in some of the strata drilled through before the oil sand is reached, and it is necessary before the well is completed to shut off the *ater so that the same cannot flow downwardly into the oil sand and become mixed with the oil taken from the well. Several methods have been employed for accomplishing this purpose, and it is a common method to place cement between the casing and the wall of the, well. In hard formations this method may last for a short time, but in many cases where the walls of the well consist of clay or other soft material, as the oil is pumped from the bottom oi the well the-pressure on the i I have illustrated my invention as applied inconnection with rotary drilling tools for drill ng a well the wall of the well being indicated at l and the bottom of the well inof the hody'meinbcr 6, the bottom of the lower side of the cement is reduced and water seeps downwardly around the cement, eventually forming passages around the ocment, 'in which case the water finds its way to the oil sand and mixes with the oil.

The main object of my invention is to provide a tool by means of which circular recesses may be cut in the wall of the well, which recesses extend outwardly into the formation a considerable distance. The recesses so formed are filled with cement thereby forming a collar of cement about the well casing which extends outwardly into the formation a sullicientdistance to prevent any appreciable amount of seepage of water about the same.

Another object of my invention is to produce a tool of the character described of simple form and construction and of simple operation. v

Referring to the drawings, which are for illustrative purposes only: Figure 1 is a vertical sectional View of the lower portion of an oil well showing a tool therein embodying a form of my invention! Fig. 2 is a vertical sectional View of the tool shown in I Fig. 1. Fig. 3 is a sectional view on line Fig. 2. Fig. 4 is a perspective View of the head which forms a part of the tool. Fig. 5 is a perspective View of one or" the cutters, and Fig. 6 is an end View of one as of the cutters.

body member 6 being closed by a wall 7 1O designates a head of a general rectangular form in cross section, which hciid is slidable in the opening 0 in the body memher 6. The head 10 is cut away at each corner, as indicated zit-'11, to receive longitudinally extending ribs 12 which extend into the opening 8 of the body member 6 from the corners thereof. The upper end of the head 10 terminates in a cap 14 which is e);- tcriorly threaded to engage within the lower end of the upper section of drill pipe 15, which drill pipe 15 extends upwardly "to the exterior of the well. i

Formed on the head 10 and extending downwardly therefrom is a rod 16 which extends through the wall 7 in the lower end of the body member 6 through packing l? therein and packing follower 18. The lower end of the rod 16 is threaded and proided with lock nuts 20. These loch nuts may be secured at various points on the rod 16 to adjust the amount of travel of that rod. The opposite faces of the head 10 are cut away, a indicated at 21. which cut away portions terminate in diagonally arranged guides 22, each of which is provided with e dove-tail groove 24. the guides 22 arid the grooves :"l therein being reversely arranged on the opposite sides of thehead 10,

. Thebody member 6 is provided with two lateral openings 28 parallel with the opposite faces of the head 16. Slidablymounted in each opening 26 is a cutter or blade '28, the inner end of each cutter or blade being provided with a dovetail 29 adapted to engage the respective dove-tail grooves 24: in the face of the head 16. The outer end or. each cutter 28 is provided with a cutting edge 33, the. outer ends of the cutters contanning; in general lines to the exterior of the body member 6. The lower edge 32 of each cutter'28 is beveled, as shown in Fig. 6, for the purposes hereinafter described. The head 10 is provided with a bore 33 which extends downwardly through the head and the rod-16 thereon, the bore 3-3 being provided for the purpose of delivering water from the interior of the drill pipe to the cutting shoe for the purpose of performing the usual bailing operation of the well during the cutting operation.

The operation is as follows: After the well has been drilled to approximately the point where it is desired to perform the cementing operation, the tool is mounted in the drill pipe, as shown.

. drill pipe is of sutiicient length sp that the cutting shoe 3 rests upon the bottom of the well 2, the parts of the tool, as the drill pipe carrying the tool reaches the bottom of the well, assuming the position shown in Fig. 2, in which position the weight of the drill pipe is carried by head 10 which is prevented from moving downwardly by the cutters 28, the cutting faces 30 of which contact with the wall of the well. As the drill pipe is rotated in the .usual manner of r'otating drill pipes with a rotary rig, the weightof the casing on the head 10 causes the cutters 28 to be moved laterally through the openings 26 in the body member 6, due to the fact that the inclined guides and the walls of the dovetail grooves 24 on the head 10 engage the inclined inner ends of the cutters 28. As the wall of the well is cut away by the cutting edge 30 of the cutters 28, the head moves downwardly until the cutters have reached their extended position shown in dot and dash lines Fig. 2 and in full lines in Fig. =1, at which time the cap 14 on the upper end of the head 10 is resting against the upper face of the body member 6, as indicated in dot and dash lines Fig Q.

' If it is desired. the tool may be withdrawn as soon as the above operation hasbeen accomplished. the result being a circular opening or recess'42 cut in the wall of the well having the same depth as the cutters 28 and extending into the wall of the well a distance equal to the extended position ofthe cutting faces 30 of the cutters 28: but if it is desired to increase the depth of the recess in the well wall. the /1'otat1ve movement of the drill pipe is continued. and as the weight of the drill pipe 15 is transmitted through the body member ,6 and the lower section 4 of the drill pipe,the cutting shoe 3 commences to drill the well to a greater depth. As the cutting shoe cuts downwardly-into the bottom of the well, the beveled lower face of the cutters 28 cuts the open:'n in the wall of the well to a greater depth. indicated in Fig. 1. the downwardmovement of the cut tors 2- and the cutting shoe 3 being the same.

pipe by means of the nuts 20 on the rod 16 engaging the under face of the packing fol- The lower section! of the,

expand and retract said head adapted to engage the upper end of 1'5 7 said body member,

with relati n to each other, a lateral opening in said body member, a dove- 130 lVhen the recess or made of suflicient depth, the tool is removed from a the well in the following manner.

The drill pipe 15 is pulled upwardly causing the head-"l0 to slide or move vertically in the body member 6, which retraetsthe cutters 18 into the caused by the engagement of the dove-tails 29 on the cutters with the inclined dovetail /grooves 2-l on the head 10. When the cutters have assumed the position indicated in Figs. 2 and 3, the continued upper movement of the drill pipe 15 lifts the body memher 6 and the lower section 4 of the drill lower 18.

As shown in Fig. 1, several openings or recesses may be made in the well wall, in which case the upper recess is first made, after which the as heretofore described, and a shorter section of drill pipe inserted for the section 4 shown, after which the same operation is repeated for cutting the lower recess as is performed in cutting the upper one. have been cut in the wall of'the well, cement is thrown into the bottom of the well in any preferred manner, which cement fills the well to a point above the highest recess and 95 extending into and filling the recesses 42. Before the cement has become set, the well casing, not shown, is forced-downwardly through the cement to the bottom of the Well,

leaving cement between the casing and wall 19 has collars or extendedof the well which bodies of cement around the casing at ea'clr recess, after which the cement within the well casing is drilled out or removed and the operation of drilling the well continued 10-5 into the oil sand.

What I claim is i- I 1. A well tool comprising a body member,

a head slidably mounted in said body m'em-"- her, said body member having a lateral'lg fi,

open ng in each side thereof, a cutter in each opening, slidable engaging means be tween said cutters and said head adapted to cutters, a cap on said,

a rod on said head extending downwardly through the bottom of said body member, and means on the lower 7 end of "fllll rod for limiting the upward movement of said head,relative to the body 1226;

member. I

A well tool comprising a body member, having a lateral opening in the opposite sides thereof. a head slidably nally arranged wall on the opposite sides of said head. each having a dove-tail groove therein. said walls being reversely inclined cutter in each opening 42 has been 4 position shown in Figs. 2- and 3 tool is withdrawn from the well,

After the recesses 1 extending into A the upper end of said body member, a diagomes es tail on the inner end of each cutter, and a means whereby said head may be raised and lowered in said body member.

3. A Well tool comprising a body member having a lateral opening in the opposite sides thereoL-a head slidably extending into the upper end of said body member, a diagonally arranged nail on the opposite sides of said head, each having a dovetail groove therein, said Walls being reversely inclined with relation to each other, a cutter in each lateral opening in said body member, a dovertail on the inner end of each cutter, a cap on the upper end of said head adapted to engage the upper end of said body member, a rod on the lower end of said head ex tending through the bottom of said body member, and means on said rodjor limiting the upward movement of said head in said body member.

l. In combination with a drill pipe, a tool comprising a body member having a lateral openingv in the opposite sides thereof, a cutter in each opening, a head slid-ably mounted in said body member, a cap on the upper end of said head secured to the lower end of said drill pipe, said cap being adapted to engage the upper end of said body member, a rod on the lower end of said head extending through the bottom of said body member, means on said rod for limiting the upward movement of said head, means on the lower end of said body member for supporting the same, and means for slidably engaging said cutters with said he; for ex panding and retracting said. cutters.

.3. In combination with a drill pipe, a tool comprising a body member having a lateral opening in the opposite sides thereof, a cutter slidably mounted in each opening, a head slidably mounted in said body member, means for preventing relative turning movement between said head and said body memher, a cap on the upper end of said head secured to the lower end of said drill pipe,

said cap being adapted to engage the upper end of said body member, means on said head for engaging said body member for limiting the upward movement of said head in said body member, a section of pipe secured to the lower end of said body member, a cutting shoe on the lower end of said section of pipe, and means for slidably engaging said cutters with said head for ex-' panding and retracting said cutters.

(3. A well tool comprising a head, a body member slidably mounted on said head and having lateral-openings in the sides thereof, a cutter in each'opening in said body member, means on said head for expanding and retracting said cutters, and a'rod on said head extending downwardly through the bottom of said body member and provided with adjusting means for limiting the travel of said body member on said rod.

7. 5 Well tool comprising a pipe, a head fastened to said pipe, a body member slidable on said head and having lateral openings in the sides thereof, diagonally arranged walls on the opposite sides of said head each having dove tail groove therein, said walls being reversely inplined with relation to each. other, and a cutter' in each lateral opening in the said body member, each cutter having a dovetailed opening engaging the grooves in said head.

8. A well tool comprising a pipe, a head rigidly secured to said pipe, a body member slidable on said head and having lateral openings in the sides thereof, diagonally arranged Walls on the opposite sides of said head each having a dovetail groove therein, said walls being reversely inclined with relati on to each other, a, cutter in each lateral opening in said body member, each cutter having a dovetailed opening engaging the rooves in said head, and a rod on said head extending downwardly through the bottom of said b0 y member and provided with adjusting means for limiting the travel of said body member on said rod.

9. A well tool comprising a pipe, ahead rigidly secured to said pipe, at body member slidably mounted on said pipe, cutters adapted to be expanded and retracted by said head, and a cutting member rigidly attached to said body member and having a recess therein, said head extending into said recess and having a passage for conducting water into said recess.

10. A well tool comprising a body member having vertical slots therein these slots being parallel with the axis of the well, cutters carried by these slots, said cutters being moved in a line at right angles to said ax s, and means for adjusting the distance said cutters may be moved.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 7th day of December, 1912.

' HUGH A. BARDEEN.

In presence of- FRANK L. A' GRAHAM, LORRAINE E. Dunnow. 

